There's like a button on top of the video or next to it i'm not aure, but aometimes you click on a video and youhappen to hit that button instead,
Youtube opens some faq page, if you click to go back, the front page has now been refreshed and the video is gone never to be seen again
Yes, but it does a refresh for some reason when you use it. And it also makes the thing more painful sometimes, because first the browser uses the cache, shows you the page as you left it, then it does a refresh before anything becomes clickable